Democrats in both chambers are clamoring for action on a House bill that passed months ago. H.R. 8 would expand federal background checks for the sale or transfer of almost every firearm, closing a loophole that allowed private gun sales to go unchecked.

The Senate has so far refused to take up the bill, or any gun legislation, for that matter.

“Do not sit by and watch this slaughter continue,” Sen. Chris Murphy said.

“The background checks bill has been lingering, sitting on the Senate calendar for 100 days,” he added. “In those 100 days, 10,000 people have been shot. In those 100 days, there have been over 100 mass shootings.”